End wall for containers

ABSTRACT

This invention relates to an end wall for a container which comprises a polygonal plate having a central cylindrical aperture therein, and belt means surrounding the plate and including, at the corners of the plate, projections thereon which engage with corresponding recesses in the plate.

United States Patent [191 Oehlmann Sept. 4, 1973 END WALL FOR CONTAINERS [75] Inventor: Hermann Oehlmann,Wiesbaden,

Germany [73] Assignee: Kalle Aktiengesellschaft,

Wiesbaden-Biebrich, Germany 22 Filed: May 28, 1969 21 Appl. No.: 828,554

[30] Foreign Application Priority Data May 30, 1968 Germany K 61383 [52] U.S. Cl. 206/59 E, 206/52 R, 206/58 s [51] Int. Cl 365d 85/66 [58] Field of Search 206/59 M, 59 E, 59 F, 206/59 C, 58, 52, 52 F; 229/55; 220/66 [56] References Cited UNITED STATES PATENTS Gordon .{206/59 E 3,260,362 7/1966 Schwinne 206/59 E 3,352,410 11/1967 Salladay et 211.... 2,877,937 3/1959 Weir 229/55 Primary ExaminerWilliam T. Dixson, Jr. Attorney-James E. Bryan [57] ABSTRACT This invention relates to an end wall for a container which comprises a polygonal plate having a central cylindrical aperture therein, and belt means surrounding the plate and including, at the corners of the plate, projections thereon which engage with corresponding recesses in the plate.

7 Claims, 5 Drawing Figures PATENTEDSEP 41m 3. 756392 SHEET 1 (IF 2 INVENTO HERMANN OEHL BY. 9 m

ATTORNEYS PAIENIEnsEP 4mm 3.756392 SHEEI 2 0F 2 INVENTOR HERMANN OEHLMANN BY 5 g! 841;

ATTORNEYS END WALL FOR CONTAINERS The present invention relates to a one-part end wall, made from synthetic plastic material or other moldable material, for containers of goods wound on reels, which wall, with the use of a second corresponding end wall, is the supporting part of a rigid container assembly.

Conventional containers generally are of such a construction that, in a wooden case or in a case of corrugated paper, additional parts are inserted for centrally positioning the wound roll. The additional parts are, for example, wooden boards with hubs thereon, perforated discs of plywood, molded fiber or thick paperboard stock with inserted centering bushings of sheet metal or synthetic plastic material, or also partially ribbed molded articles of synthetic plastic material with molded integral receiving bolts.

The disadvantage of all these containers is that they include too many individual parts which, in addition, are not keyed to one another. This renders the container assembly unstable, especially in the case of heavy wound rolls.

The present invention provides an end wall for a container, which, in addition to the receiving bolt for the wound goods to be packed, has the corresponding connecting parts for a container sleeve so that the end walls, together with the surrounding container sleeve, provide a rigid container assembly.

This is achieved by an end wall including a square, preferably quadratic, planar plate provided with radial stiffening corrugations, a central cylindrical aperture for the reel with the wound material (which cylinder, if desired, may be provided with holding prisms), and a belt surrounding the plate and having small prismshaped ledges on the exterior thereof. At the corners of the plate, the belt includes four beaker-shaped projections which project into the hollow space between the wound material and the container sleeve and which are open towards the outer end. The belt advantageously may have such a shape that it has a circumferential holding strap provided with teeth.

The end wall will be further illustrated bythe accompanying drawings, in which:

FIG. 1 is a perspective diagrammatic view of the container assembly with end walls in accordance with the invention,

FIG. 2 is a view in elevation of the container end,

FIG. 3 is the corresponding side elevation, partially in section,

FIG. 4 is an alternative view of the belt with the holding strap, as a partial section, and

FIG. 5 is the view in elevation corresponding to FIG. 4.

The end wall is a planar, square, preferably quadratic, plate 1 stiffened with radial corrugations 2, and having the central receiving cylinder 3 for the reel with the wound material, not shown. The receiving cylinder 3 may be a cylinder open at the outer end or it may have a closed end. A receiving cylinder open at the end is preferred. It may be subsequently closed by means of an insertable thin-wall plastic disc which also is suitable for identification or advertising purposes.

In order to provide better anchorage to the reel, that side of the receiving cylinder 3 which contacts the wound material is provided with the holding prisms 9.

At the outside, the end wall is limited by a belt 4, about 60 to 70 mm wide, positioned asymmetrically with respect to the stiffened plate 1. The preferably wide belt 4 provides a good support for the end wall in the sleeve portion 10 of the container assembly, but especially guarantees that the clip connectors 11 between the belt and the sleeve are sufficiently spaced from the outer boundary edges of the end wall as well as of the sleeve.

The belt 4 may have the same thickness over its entire width, but it also may slightly taper from its contact with the plate 1 towards its lateral boundary edges.

For increasing the frictional contact between the belt 4 and the container sleeve, the belt 4, on the outer surface thereof, has prism-shaped ledges 5 which penetrate into the sleeve skin when the belt 4 is clamped to the sleeve.

In the four corners of the end wall, beaker-shaped projections 8, open towards the outer side of the end wall, are provided in the free space between the wound material and the container sleeve, having a minimum depth corresponding to the belt width. In the case of especially large end walls, the beaker-shaped projections 8 also may be deeper and exceed the belt width. Additional clamping between the belt 4 and the container sleeve 10 is thus possible, especially in the area of the sleeve edges.

The circumferential belt 4 additionally may have a holding strap 6, as shown in FIGS. 4 and 5, and holding teeth 7 on this strap. The holding teeth penetrate into the sleeve surrounding the container and hold it, in the manner of stitching hooks, against removal.

Clamping of the end walls to the container sleeve provides secure support to the end wall therein and, in combination with the container sleeve, constitutes a stiff container assembly since the sleeve itself is a selfcontained tube.

The stiffness is eliminated by slitting the container sleeve along one edge. Consequently, opening of such a container after slitting one sleeve edge can be easily continued by successively removing the individual sleeve surfaces from the end wall beltby tearing them off the clamps. In this manner, all four sleeve surfaces can be easily removed from the end walls. In the case of sleeves the joining edges of which are closed by means of an adhesive tape 12, it is advantageous for opening the container to slit the adhesive tape along the edge 13 and to continue further unpacking as described above.

The use of the end wall of the invention simplifies storage since the sleeves must be stocked, with respect to the end wall measurements, in one, or at the most two, standard sizes only, from which, in the case of different widths of the wound goods to be packed, the required intermediate sizes can be easily obtained by reducing the size using hammer shears or a belt saw. Furthermore, by clamping the container ends to the outer sleeve by means of only few clamps, a torsion-resistant stiff container is obtained which firmly holds the packed wound material. Moreover, the end wall of the invention makes it possible that the wound material can be unpacked very gently.

It will be obvious to those skilled in the art that many modifications may be made within the scope of the present invention without departing from the spirit thereof, and the invention includes all such modifications.

What is claimed is:

1. An end wall for a container which comprises a polygonal plate having a central cylindrical aperture 5. An end wall according to claim 1 in which the belt includes protuberances on the exterior thereof adapted to engage with a container wall.

6. An end wall according to claim 1 in which the belt has a circumferential holding strap provided with teeth.

7. An end wall according to claim 1 in which the projections on the belt have a polygonal configuration. 

1. An end wall for a container which comprises a polygonal plate having a central cylindrical aperture therein, and belt means surrounding the plate and including, at the corners of the plate, projections thereon which engage with corresponding recesses in the plate.
 2. An end wall according to claim 1 in which the polygonal plate is square.
 3. An end wall according to claim 1 in which the plate is provided with reinforcing corrugations.
 4. An end wall according to claim 1 in which the cylindrical aperture is provided with holding prisms.
 5. An end wall according to claim 1 in which the belt includes protuberances on the exterior thereof adapted to engage with a container wall.
 6. An end wall according to claim 1 in which the belt has a circumferential holding strap provided with teeth.
 7. An end wall according to claim 1 in which the projections on the belt have a polygonal configuration. 